Just one year ago, New York City officials were celebrating the lowest number of fire fatalities the city had ever seen in over 100 years. It was the largest number of fatalities in a single fire in New York since 1990, when 87 people perished in an arson attack on a Bronx social club – less than a mile from the scene of last night’s deadly fire. “We’re here at the scene of an unspeakable tragedy in the middle of the holiday season, a time when families are ­together,” said New York Mayor Bill de Blasio (D) at a press conference Thursday evening, with temperatures in the teens.